Photographic-printing desk.



CARL EIALPERN, E NEWARK, NEW JERSEY.

PHOTOGRAPHIC-PRINTING DESK.

. Specification of Letters Patent.

Patented Sept. 29, v-1914.

-.=lcation led November 17, 1913. Serial No. 801,346.

I T o all whom it may concern:

Be it known that I, CARL HALPERN, a citizenof the UnitedStates, and aresident of the city of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Photographic-Printing Desks, of which the .following is a specification.

The object of my invention is to afford a simple, cheap but effective desk for--con reniently and expeditiously printing from photographicv negatives, either plate or film, one adapted to the re uirements of either the amateur or the pro essional photographer. I

The invention consists in the combination and construction of parts herein described and claimed specifically, a distinctive feature being the use of a retractile curtain or shutter arranged to automatically' shut off the light and quickly terminate the exposure when released as hereinafter fully set forth.

In the accompanyingdrawings, Figure 1, is au isometrical vien' of my photo-printing desk; Fig. 9i, a. rear View thereof; Fig. 3, a vertical sectional elevation taken upon plane of line 3-3 Fig. 2; Fig. 4. a sectional detail taken upon .plane of line 4-l Fig. '2; Fig. 5, a transverse sectional diagram taken upon plane of line 5 5 Fig. 3, through the upper part of the desk only, certain details not in sec-tion being omitted.

The desk D, is formed primarily of a base d, side members d. d', top (l2. and inclined Vfront (I3, the latter being formed with the light-aperture The rear of the desk is open and adapted to be inserted between the sill and raised lower sash of a windo\\',-the sash resting against the top (l1, and the space at the side or sides of the desk being curtained off to exclude the light except as admitted through the exposure aperture (l. This is where day light is to be used to efl'cct the printing. 'herc artificial light is to be used it is suitably arranged in or at the back of the desk, as may be found most expedient.

A reflector R, is positioned vwithin the desk, thc rear edge resting upon the basi` (l, and the front edge being supported upon and between parallel rack shoulders di'. d, arranged in coincidence upon thc inner sides of the members d', 1l. By this moans the reflector may be set in accordance with requirements to meet or compensate for external light conditions, the degree of. ini clination being raised, for instance when the sun is near the horizon, and lowered when it is at or near the meridian.

Normally the exposure aperture d4, is closed by a slidable' curtain or shutters, controlled by retractile springs s', s', Set in grooves o, d, formed in the inclinedA edges of the side members d', dj',-thelo\ve1" end of each of said rectractile springs s', s', being attached to the edge of the shutters, which protrudes into the groove d", on tha-t side of the desk, and the upper end of each spring being secured to the side member;"as indicated more particularly in Figs. 4 and The inner shorter sidewall d", dx, of

veach groove d, d, 'acts as a supporting guide for the shutter s. which is drawn to make an exposure agar st the resistance of the retractile springs s', s', by meansof a flexible connection s2, adapted t0 be actuated either by hand or through the medium of a pedal. Shoulders s", on the shutter rest against the shorter side Walls 1l", of the grooves d, and preserve the alinement and easy travel of the shutter.

n. represents either a negative to be printed from. or a plate of glass for the support f.

of a film if the latter is to be printed frcm, iu which case the film is passed under rollers a. (l. mounted on the. side members d',d, parallel to the inclined front d", in such manner as to act as guides to preserve the alincmcnt of the film strip and keep it taut.

The negative or glass support n, is positioned over the exposure aperture a", by means of guiding and supporting shoulders c, c, parallel to the adjacent edges of said opening` which shoulders may also be used as gages for positioning the sensitized pa4 per to be exposed to the action of light ad mitted through the aperture when the shutter s. is withdrawn temporarily by means of the flexible connection se. The sensitized paper is held down against the negative during exposure by means of a sectional pressure back B, hinged to the top (Z2, of the desk and held open normallyY against a stop l, by a retractile spring e', as, shown in Fig. 3.--said pressure back B, being actuated in use by hand against resist Aance of the spring e. in a manner well tion s2, gives the operator direct and absolzo 5 tive.'

The device is especially adapted for the rapid printing of the highly sensitized apers at 'present in vogue; while equarily adapted to time exposure required by dense negatives.l since the flexible cord or conneclute control of the shutter s, and the retrac- -tile springs a', s', insure inst'antaneous closure of the exposure aperture da, when the shutter is released.

v It isto be noted that the retractile springs c', s', are so situated as to be entirely concealedv and protected and hence are not liable to injury or derangelnent,` their alinement within the grooves insuring an even tension on both sides of the shutter and thereby obviating binding or undue frietional contact.

What I` claim as my invention and desire to secure by Letters Patent is,

1. In a photo-printing device of the character designated the combination of the inclined front formed with the exposure aperture and gage shoulders,-of the side members each formed with a groove for the support-ofthe edge of a shutter, said shutter "mounted in and between said grooves retraetle springs situated in said grooves and -attached to said shutter and to stationary parts, and a flexible connection for actuating -p spjdshuttcr against the resistance o`f said retractile springs, as and for the purpose set forth. l

2. In a photo-printing device of the character designated the combination of the inclined front formed with the exposure aperture and gage shoulders, of the grooved side members each formed with a groove for the support of the edge of a shutter. said shutter mounted in and between said grooves, retractile springs situated in said grooves and attached to said shutter and to stationary parts, a flexible connection for actuating said sliuter against the action of said retractile springs, and one or more film guide rollers mounted on the side members parallel to the exposure aperture as and for the purpose described.

3. In a photo-printing device of the character designated the combination of the inclined front formed with the exposure aper ture and gage shoulders, of the grooved side members each formed with a groove for the support of the edge of a shutter. said shutter mounted in and between said grooves, retractile springs situated in said grooves and attached to said shutter and to stationary partsf a flexible connection for actuating said shutter against the action of the said retractile springs, a reflector' within the desk below the exposure aperture, and means for adjusting said reflector in inclination, and for the purpose set forth.

CARL HALPEIIN. Witnesses:

GEO. WM. MIAT'r,

DOROTHY MIATT, 

